Needle dislodgement detection systems and methods

US12390571B2 · kind B2 · utility

Assignees

• AWE Technologies LLC · US
• Fresenius Medical Care Deutschland GmbH · DE
• Fresenius Medical Care Holdings, Inc. · US

Inventors

• Dipen N. Sinha · Los Alamos, US
• Robert SCHAEFER · Bay Shore, US
• Curtis F. Osterhoudt · Los Alamos, US
• Peter G. Espina · Bay Shore, US
• Martin Joseph Crnkovich · Walnut Creek, US
• Fei Wang · Hangzhou City, CN
• Steve M. Bowman · Essex, US
• Martin Urban · Bad Kötzting, DE

Key dates

• Filing date: Oct 24, 2024
• Grant date: Aug 19, 2025
• Expiry date: Oct 24, 2044

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2230/06
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

This disclosure teaches a system and method for monitoring an extracorporeal blood circuit of a patient and identifying a needle dislodgement. The method includes identifying a potential needle dislodgement event based on changes in pressure of the extracorporeal blood circuit, searching for a heart rate of a patient by analyzing an optical backscatter signal from an optical sensor attached to the extracorporeal blood circuit or by analyzing a pressure signal representative of the pressure in the extracorporeal blood circuit, and verifying the potential needle dislodgement event is a needle dislodgement based on the absence of the heart rate.